针对地下水封洞库工程受灌体围岩条件特征,对拟采用的水泥-水玻璃防渗灌浆材料在不同材料配合比参数条件下,参照现行水泥砂浆相关试验标准开展抗硫酸盐侵蚀性能、抗冻融性能、干燥收缩性能试验。大量的样本试验结果表明:经过抗硫酸盐侵蚀后水泥-水玻璃灌浆材料抗折强度损失率均＞-50%;优选配合比冻融试件抗压强度损失率＜25%,质量损失率＜3.0%;优选配合比试件56 d干燥收缩率＜7.0%。通过研究在不同参数条件下水泥-水玻璃灌浆材料耐久性性能波动规律,探究差异性匹配地下水封洞库工程不同工况条件下防渗水泥-水玻璃灌浆材料品质控制要求,可为湛江国家石油储备地下水封洞库工程防渗灌浆材料工程运用提供技术支撑。

In the aim of supporting the engineering application of grouting material in underground water-sealed cavern at Zhanjiang national petroleum storage project, we conducted tests on the sulfate corrosion resistance, freezing thawing resistance and drying shrinkage of grouting material composed of cement and water glass(sodium silicate)in line with current test standards. The cement-sodium silicate grouting material used in the tests were designed at different mix proportions. A large number of sample results showed that after corrosion resistance test, the loss rate of cement-sodium silicate grouting material's rupture strength was higher than -50%; after freezing thawing test, the loss rate of compressive strength at optimum mix ratio was less than 25%, and the mass loss rate was less than 3%; the drying shrinkage rate of grouting material with optimized mix ratio at the 56^th day was less than 7%. In addition, the quality control requirements for cement-sodium silicate grouting material were discussed by analyzing the fluctuation of durability under different parameters.